JPH09299501A - Running water detector - Google Patents
Running water detectorInfo
- Publication number
- JPH09299501A JPH09299501A JP8123378A JP12337896A JPH09299501A JP H09299501 A JPH09299501 A JP H09299501A JP 8123378 A JP8123378 A JP 8123378A JP 12337896 A JP12337896 A JP 12337896A JP H09299501 A JPH09299501 A JP H09299501A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- check valve
- water
- spindle
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Check Valves (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
(57)【要約】
【課題】 非火災時の少量流水時における誤報を確実に
予防でき、火災警報の確実性を図る。
【解決手段】 作動弁型の流水検知装置において、逆止
弁体１０から円弧状突起体２７を流入口３側へ向けて突
設するが、この円弧状突起体２７は逆止弁体１０の回動
中心を中心として描く円弧状に、かつ弁座５の内径より
も僅かに小さい直径をもつ断面円形状に形成し、以て弁
座５の内周と円弧状突起体２７とで形成される環状のす
きま部３１の断面を流路断面積とする。これにより流水
検知装置内の通水量が少ない時のスピンドル１１の回動
角度と、スプリンクラーヘッドが作動し放水した時のス
ピンドル１１の回動角度との差を大きく採ることがで
き、流水感知角度をスプリンクラーヘッド１個が作動し
た時の流水時角度の近くに設定することで非火災時の少
量通水時の誤報を無くすることができる。
(57) [Abstract] [Problem] It is possible to reliably prevent a false alarm when a small amount of water is flowing when there is no fire, and to ensure the reliability of a fire alarm. In an actuating valve type water flow detection device, an arcuate projection 27 is projected from a check valve body 10 toward the inflow port 3 side, and the arcuate projection 27 is provided in the check valve body 10. It is formed in an arc shape centered on the center of rotation and a circular cross section having a diameter slightly smaller than the inner diameter of the valve seat 5, and is thus formed by the inner circumference of the valve seat 5 and the arc-shaped projection 27. The cross section of the annular clearance 31 is defined as the flow passage cross sectional area. As a result, the difference between the rotation angle of the spindle 11 when the amount of water passing through the water flow detection device is small and the rotation angle of the spindle 11 when the sprinkler head is activated and water is discharged can be taken large, and the water flow detection angle can be increased. By setting the angle near the flowing water when one sprinkler head is activated, it is possible to eliminate false alarms when passing a small amount of water when there is no fire.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スプリンクラー設
備に使用されるスウィング作動弁型の流水検知装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing-operated valve-type running water detecting device used for sprinkler equipment.
【０００２】[0002]
【従来の技術】この種の作動弁型の流水検知装置は、一
次側から二次側への流水により逆止弁体が開き回動する
と、該逆止弁体と共に回動するスピンドルの一端部によ
り信号発生手段が駆動されて信号を出力し、電気的に警
報を発するものとなっている。通常、流水検知装置１個
に対し、二次側には複数個のスプリンクラーヘッドが設
置されている。そして火災が発生し、スプリンクラーか
ら放水が行われると、流水検知装置の一次側から二次側
への流水に応じて逆止弁体が回動し、逆止弁体と共に回
動するスピンドルの回動角をセンサで検出して警報を発
する。その感知は、スプリンクラー１個の流水量（５０
ｌ／min at 1kgf ／cm2 ）から複数個（通常、数十
個）の流量範囲において検知されるものでなければなら
ない。2. Description of the Related Art This type of operating valve type running water detecting device is configured such that when a check valve body is opened and rotated by flowing water from a primary side to a secondary side, one end of a spindle which rotates together with the check valve body. Drives the signal generating means to output a signal, and electrically issues an alarm. Usually, a plurality of sprinkler heads are installed on the secondary side for one running water detection device. Then, when a fire occurs and water is discharged from the sprinkler, the check valve body rotates according to the water flowing from the primary side to the secondary side of the water flow detection device, and the rotation of the spindle that rotates together with the check valve body. The moving angle is detected by a sensor and an alarm is issued. The sensing is based on the flow rate of one sprinkler (50
1 / min at 1 kgf / cm 2 ) to several (usually several tens) flow rates.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、作動弁型の
上記流水検知装置では、実際に火災が発生していなくて
も、例えば二次側配管での漏水や点検中の少量の出水等
により、また他の防火区域への送水のためのポンプ起動
に際して流水検知装置の逆止弁体が僅かに開き回動す
る。この逆止弁体の僅かな回動角度は、火災発生により
スプリンクラー１個が作動したときの逆止弁体の回動角
度とそれ程の差が無く、また、一般に角度変化による感
知方法は誤差が出やすく、設定感知角度は実際、感知角
度を広く含む為、感知してはならない角度と感知しなく
てはならない角度との間での警報感知角度の設定は非常
に難しく、又実火災が無くても警報するという誤報も多
発していた。この点についての改良型とも言える流水検
知装置が、特開平７−２６５４５４号公報で提案されて
いる。そこでは、逆止弁体これ自体にも細い流水路を形
成し、この流水路にボール弁を介入することにより、二
次側配管での漏水等のような非火災時の少量流水が生じ
たときはその細い流水路のボール弁が開いて通水するよ
うにしている。しかしながら、逆止弁体これ自体に設け
た細い流水路及び小さいボール弁にはスラッジやごみ等
が詰まり易く、その機能を充分に発揮しないおそれがあ
る。However, in the above-mentioned running water detecting device of the actuation valve type, even if a fire has not actually occurred, for example, due to water leakage in the secondary piping or a small amount of water flowing out during inspection, etc. Also, when the pump for water supply to another fire protection area is started, the check valve of the flowing water detecting device is slightly opened and rotated. The slight rotation angle of the check valve body is not so different from the rotation angle of the check valve body when one sprinkler is activated due to the occurrence of a fire, and generally, there is an error in the sensing method based on the angle change. It is easy to get out, and the set sensing angle actually includes the sensing angle widely, so it is very difficult to set the alarm sensing angle between the angle that should not be sensed and the angle that must be sensed, and there is no actual fire Even so, there were many false alarms to alert. Japanese Patent Laid-Open No. 7-265454 proposes a water flow detection device that can be said to be an improved type in this respect. There, a small flowing water channel was formed in the check valve itself, and a ball valve was inserted in this flowing water channel to generate a small amount of flowing water during non-fire, such as water leakage in the secondary piping. At that time, the ball valve in the narrow water passage opens to allow water to flow. However, sludge, dust, and the like are likely to be clogged in the narrow flowing water passage and the small ball valve provided in the check valve body itself, and there is a possibility that the function may not be sufficiently exhibited.
【０００４】そこで本発明の目的は、このような問題を
解消するためになされたもので、非火災時の少量流水時
における誤報を確実に予防でき、火災警報の確実性を図
ることのできる流水検知装置を提供することにある。Therefore, the object of the present invention is to solve such a problem, and it is possible to reliably prevent false alarms when a small amount of water is flowing when there is no fire, and to ensure the reliability of a fire alarm. It is to provide a detection device.
【０００５】[0005]
【課題を解決するための手段】本発明は、流水制御弁と
信号発生手段とからなり、前記流水制御弁は、一次側の
流入口と二次側の流出口とを有し、両者間に弁座を介し
て弁室を形成した弁本体と、前記弁室に、前記流入口か
ら流出口への流水圧によって開かれるよう回動可能にス
ピンドルまわりに軸支された逆止弁体とを有し、前記ス
ピンドルは前記逆止弁体と共に回動可能に装着され一端
が前記弁本体の外部へ突出しており、前記信号発生手段
は前記逆止弁体の回動に伴って回動する前記スピンドル
の前記突出端の回動角を検出して信号を発するセンサか
らなる作動弁型の流水検知装置において、前記逆止弁体
から円弧状突起体を流入口側へ向けて突設するが、この
円弧状突起体は前記逆止弁体の回動中心を中心として描
く円弧状に、かつ前記弁座の内径よりも僅かに小さい直
径をもつ断面円形状に形成し、以て弁座の内周と円弧状
突起体とで形成される環状のすきま部の断面を流路断面
積とすることを特徴とする。The present invention comprises a water flow control valve and a signal generating means, wherein the water flow control valve has a primary-side inlet and a secondary-side outlet, and between them. A valve body having a valve chamber formed through a valve seat, and a check valve body pivotally supported around the spindle so as to be opened by flowing water pressure from the inflow port to the outflow port in the valve chamber. The spindle is rotatably mounted together with the check valve body, one end of which is projected to the outside of the valve body, and the signal generating means is rotated with the rotation of the check valve body. In an operating valve type running water detection device comprising a sensor that detects a rotation angle of the protruding end of the spindle and outputs a signal, an arc-shaped projection is provided so as to project from the check valve element toward the inlet side. The arcuate projection is in an arcuate shape centered on the rotation center of the check valve body, and The circular cross section is formed to have a diameter slightly smaller than the inner diameter of the valve seat, so that the cross section of the annular clearance formed by the inner circumference of the valve seat and the arcuate projection is the flow passage cross sectional area. It is characterized by
【０００６】上記円弧状突起体に代えて、上記逆止弁体
を受ける弁座から円弧筒状壁を前記逆止弁体の外周を囲
むよう流出口側へ向けて突設し、該円弧筒状壁は前記逆
止弁体の回動中心を中心として描く円弧状に、かつ前記
逆止弁体の断面直径よりも僅かに大きい内径を持つ横断
面Ｃ形に形成し、以て逆止弁体の外周と円弧筒状壁の内
周とで形成される環状のすきま部の断面を流路断面積と
することもできる。Instead of the arcuate projection, a circular arcuate cylindrical wall is provided so as to project from the valve seat that receives the check valve body toward the outlet side so as to surround the outer circumference of the check valve body, and the arcuate cylinder. The wall is formed in an arc shape centered on the center of rotation of the check valve body and in a C-shaped cross section having an inner diameter slightly larger than the cross-sectional diameter of the check valve body. The cross section of the annular clearance formed by the outer circumference of the body and the inner circumference of the arcuate tubular wall can be the flow passage cross sectional area.
【０００７】[0007]
【作用】弁座の内周と円弧状突起体とで形成される環状
のすきま部の断面を流路断面積とすることで、本来の流
路断面積に比較して非常に小さくなるため少量の流水に
より逆止弁体が急激に大きく回動し、それに伴い回動す
るスピンドルの回動角度も急激に大きく作動する。円弧
状突起体の開き回動終点以後は、流路径が弁座の内径と
なるので、流量が大きく増えてもスピンドルの回動角度
はそれ程大きく変動しないようになる。従って、例え
ば、実火災によるスプリンクラー作動時の最低流量であ
る５０ｌ／min at 1kgf ／cm2 を円弧状突起体の開き
回動終点の目安とし、その時のスピンドル回動角度より
やや小さい角度を感知角度に設定することで、流水検知
装置内の通水量が少ない時のスピンドル回動角度と、ス
プリンクラーヘツドが作動し放水した時のスピンドル回
動角度との差を大きく採ることができる。弁座から円弧
筒状壁を逆止弁体の外周をすきま部をおいて囲むよう流
出口側へ向けて突設することによっても、同様の作用が
働く。[Function] By making the cross-section of the annular clearance formed by the inner circumference of the valve seat and the arc-shaped projection the flow passage cross-sectional area, it becomes much smaller than the original flow passage cross-sectional area, so a small amount The non-return valve body suddenly and largely rotates due to the flowing water, and the rotation angle of the spindle that rotates with it also suddenly and largely operates. After the end point of the open rotation of the arcuate projection, the flow path diameter becomes the inner diameter of the valve seat, so that the rotation angle of the spindle does not change that much even if the flow rate increases significantly. Therefore, for example, the minimum flow rate of 50 l / min at 1 kgf / cm 2 when the sprinkler is activated due to an actual fire is used as a guide for the end point of the open rotation of the arcuate projection, and the angle slightly smaller than the spindle rotation angle at that time is the sensing angle. By setting to, it is possible to make a large difference between the spindle rotation angle when the amount of water passing through the water flow detection device is small and the spindle rotation angle when the sprinkler head operates and discharges water. The same action also works by projecting the arcuate tubular wall from the valve seat toward the outlet side so as to surround the outer circumference of the check valve body with a clearance.
【０００８】[0008]
（実施例１）図１は本発明に係る流水検知装置の縦断面
図、図２は図１におけるＡ−Ａ線断面図、図３は同装置
の平面図、図４は同装置の正面図、図５は同装置の側面
図である。図１及び図２において、１は流水検知装置を
構成する流水制御弁、２は弁本体で、送水ポンプ側に接
続される一次側の流入口３と、スプリンクラーヘツド側
に接続される二次側の流出口４とを有し、両者の間に弁
座５を介して弁室６が形成されている。弁室６の一側方
には排水管に接続される排水口７を有し、その排水口７
と直交する他側方には開口部８を有し、この開口部８を
蓋９で塞いでいる。弁室６には逆止弁体１０が、流入口
３から流出口４への流水圧によってスピンドル１１まわ
りに開き回動可能に軸支されている。逆止弁体１０は円
盤状に形成されてこの一端に軸通孔１２を有するハブ１
３を突設し、その軸通孔１２にスピンドル１１を嵌合す
るとともに、ハブ１３及びスピンドル１１に抜止ピン１
４を直交状に打ち込むことによりスピンドル１１が逆止
弁体１０と一体的に結合される。(Embodiment 1) FIG. 1 is a vertical sectional view of a flowing water detecting apparatus according to the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a plan view of the apparatus, and FIG. 4 is a front view of the apparatus. 5 is a side view of the device. In FIGS. 1 and 2, 1 is a flow control valve that constitutes a flow detection device, 2 is a valve body, and a primary inlet 3 connected to the water pump side and a secondary side connected to the sprinkler head side. And an outflow port 4 thereof, and a valve chamber 6 is formed between them through a valve seat 5. A drain port 7 connected to a drain pipe is provided on one side of the valve chamber 6, and the drain port 7
An opening 8 is provided on the other side orthogonal to the opening 8 and the opening 8 is closed by a lid 9. In the valve chamber 6, a check valve body 10 is pivotally supported so as to open around the spindle 11 and rotate by flowing water pressure from the inflow port 3 to the outflow port 4. The check valve body 10 is formed in a disc shape, and has a shaft passage hole 12 at one end thereof.
3 is provided in a protruding manner, the spindle 11 is fitted in the shaft passage hole 12, and the retaining pin 1 is attached to the hub 13 and the spindle 11.
The spindle 11 is integrally connected to the check valve body 10 by driving 4 in an orthogonal shape.
【０００９】図２において、弁本体２の弁室６の内面に
一対のボス１５，１６が相対向状に突設され、一方のボ
ス１５には軸孔１７を盲状にあけ、他方のボス１６には
軸孔１８を弁本体２の内外方向にわたって貫通するよう
にあける。そして、逆止弁体１０のハブ１３の一端から
突出するスピンドル１１の一端は弁室６内の一方のボス
１５の軸孔１７に挿入し、ハブ１３の他端から突出する
スピンドル１１の他端を、他方のボス１６の軸孔１８に
挿入した別のスピンドル１９の一端に軸接手２０を介し
て連結する。軸接手２０は弁本体２のボス１６に挿通さ
れたスピンドル１９の端にピン２１を直交状に植設する
一方、逆止弁体１０に挿通されたスピンドル１１の端に
盲孔２２及び溝２３を設けてその溝２３に前記ピン２１
を嵌合させてなる。In FIG. 2, a pair of bosses 15 and 16 are provided on the inner surface of the valve chamber 6 of the valve body 2 so as to face each other. A shaft hole 17 is blindly formed in one boss 15 and the other boss is formed. A shaft hole 18 is formed in 16 so as to penetrate through the valve body 2 in the inward and outward directions. One end of the spindle 11 projecting from one end of the hub 13 of the check valve body 10 is inserted into the shaft hole 17 of one boss 15 in the valve chamber 6, and the other end of the spindle 11 projecting from the other end of the hub 13. Is connected to one end of another spindle 19 inserted into the shaft hole 18 of the other boss 16 via a shaft joint 20. The shaft joint 20 has pins 21 orthogonally planted on the end of a spindle 19 inserted into the boss 16 of the valve body 2, while the blind hole 22 and the groove 23 are formed on the end of the spindle 11 inserted into the check valve body 10. And the pin 21 is provided in the groove 23.
Are fitted.
【００１０】図４及び図５において、上記スピンドル１
９の弁本体２の外部に突出した端部１９ａの近傍位置に
は、このスピンドル１９の回動角検出用のセンサ２４を
設置する。そのセンサ２４としては、近接スイッチ、リ
ードスイッチ、そのほかマイクロスイッチあるいはリミ
ットスイッチなどが挙げられる。図示例では近接スイッ
チ２５を取り付け、この近接スイッチ２５により、逆止
弁体１０と共に回動するスピンドル１１，１９の回動角
を検出して信号を出力し、電気的に警報を発する信号発
生手段を構成する。近接スイッチ２５は、前記スピンド
ル１９の弁本体２の外部に突出した端部１９ａに固定し
た近接体２６を近接スイッチ２５の検出ヘッド２５ａ，
２５ｂの両者間に挿入することで動作し、両者間から離
すと接点が復帰する。In FIG. 4 and FIG. 5, the spindle 1 is
A sensor 24 for detecting the rotation angle of the spindle 19 is installed in the vicinity of the end 19a of the valve body 2 that projects to the outside of the valve body 2. Examples of the sensor 24 include a proximity switch, a reed switch, a micro switch, a limit switch, and the like. In the illustrated example, a proximity switch 25 is attached, and the proximity switch 25 detects a rotation angle of the spindles 11 and 19 that rotate together with the check valve body 10 to output a signal and electrically generate an alarm. Make up. The proximity switch 25 includes a proximity body 26 fixed to an end portion 19a of the spindle 19 protruding outside the valve body 2 from a detection head 25a of the proximity switch 25,
It operates by inserting it between both of 25b, and when separated from both, the contact is restored.
【００１１】上記構成の流水検知装置において、本発明
は、上記逆止弁体１０から円弧状突起体２７を流入口３
側へ向けて突設する点に特徴を有する。図１に示すよう
に、その円弧状突起体２７は逆止弁体１０の回動中心を
中心として描く円弧状に、かつ弁座５の内径よりも僅か
に小さい直径をもつ断面円形状に形成されるとともに、
その上端に小径の凸部２８が設けられる。そして円弧状
突起体２７は凸部２８を逆止弁体１０の流入口側に面す
る下端面１０ａに設けた凹部２９に嵌合固定するととも
に、逆止弁体１０の上端面からねじ３０をねじ込み、こ
のねじ３０の締めつけで逆止弁体１０に円弧状突起体２
７が一体的に結合される。例えば、弁座５の内径は３６
mm、円弧状突起体２７の直径は３１mm、円弧状突起体２
７の突出端面２７ａと逆止弁体１０の下端面１０ａとが
成す角度θは３０°とする。これにより弁座５の内周と
円弧状突起体２７との間に環状のすきま部３１が形成さ
れ、このすきま部３１の断面を流路断面積とする。According to the present invention, in the flowing water detecting apparatus having the above-mentioned structure, the check valve body 10 is provided with the arcuate projection 27 and the inflow port 3 therein.
The feature is that it projects toward the side. As shown in FIG. 1, the arcuate projection 27 is formed in an arcuate shape drawn around the center of rotation of the check valve body 10 and in a circular cross-section having a diameter slightly smaller than the inner diameter of the valve seat 5. As well as
A small-diameter convex portion 28 is provided on the upper end thereof. Then, the arc-shaped projection 27 fits and fixes the convex portion 28 into the concave portion 29 provided in the lower end surface 10a facing the inlet side of the check valve body 10, and the screw 30 is screwed from the upper end surface of the check valve body 10. By screwing in and tightening this screw 30, the arc-shaped projection 2 is attached to the check valve body 10.
7 are integrally connected. For example, the inner diameter of the valve seat 5 is 36
mm, the diameter of the arcuate projection 27 is 31 mm, the arcuate projection 2
The angle θ formed by the protruding end surface 27a of No. 7 and the lower end surface 10a of the check valve body 10 is 30 °. As a result, an annular clearance portion 31 is formed between the inner circumference of the valve seat 5 and the arcuate projection 27, and the cross section of this clearance portion 31 is the flow passage cross-sectional area.
【００１２】しかるときは、上記すきま部３１の流路断
面積は本来の流路断面積に比較して非常に小さくなるた
め、二次側配管での漏水や点検中の少量の出水等による
少量の流水により逆止弁体１０が急激に大きく回動し、
それに伴い回動するスピンドル１１，１９の回動角度も
急激に大きく作動する。円弧状突起体２７の先端面２７
ａが弁座５から離れる開き回動終点以後は、流路径が弁
座５の内径となるので、流量が大きく増えてもスピンド
ル１１，１９の回動角度はそれ程大きく変動しない。In this case, since the flow passage cross-sectional area of the clearance 31 is much smaller than the original flow passage cross-sectional area, a small amount due to water leakage in the secondary side pipe or a small amount of water discharged during inspection, etc. The non-return valve body 10 suddenly and largely turns due to the flowing water of
Along with this, the rotation angles of the spindles 11 and 19 which rotate are also drastically increased. Tip surface 27 of arcuate projection 27
After the end point of the open rotation where a is separated from the valve seat 5, the flow passage diameter becomes the inner diameter of the valve seat 5, so that the rotation angles of the spindles 11 and 19 do not change that much even if the flow rate increases significantly.
【００１３】図６に流水量と逆止弁体の開き角との関係
を従来の逆止弁体と比較して示す。本発明品は逆止弁体
１０に円弧状突起体２７（直径は３１mm、角度θは３０
°、弁座５の内径は３６mm）を設け、水圧１Kgf/min で
２回テストした。１回目のテスト結果を破線Ａで示し、
２回目のテスト結果を一点鎖線Ｂで示す。従来品は上記
円弧状突起体２７を有しない通常の平板形状の逆止弁体
を用いた。尤も、本発明品のテスト条件と同様に弁座の
内径を３６mmとし、水圧１Kgf/min の条件でテストし
た。その結果を実線Ｃで示す。この図６から明らかなよ
うに、本発明品Ａ，Ｂでは、少量（１５〜２０ｌ／min)
の流水により逆止弁体１０が急激に大きく回動し、スプ
リンクラー作動時の最低流水量である５０ｌ／min at
1kgf ／cm2 の流水により逆止弁体１０の開き角は大き
く、約３０°であった。これに対し従来品Ｃでは少量
（１５〜２０ｌ／min)の流水により逆止弁体の開き角の
上昇は緩やかであり、スプリンクラー作動時の最低流水
量である５０ｌ／min at 1kgf ／cm2 の流水により逆
止弁体は約１５°程度しか開かなかった。FIG. 6 shows the relationship between the amount of flowing water and the opening angle of the check valve body in comparison with the conventional check valve body. In the product of the present invention, the check valve body 10 has an arcuate projection 27 (diameter 31 mm, angle θ 30).
The inner diameter of the valve seat 5 was 36 mm), and the test was performed twice at a water pressure of 1 kgf / min. The result of the first test is shown by the broken line A,
The result of the second test is shown by a chain line B. As a conventional product, an ordinary flat plate check valve body having no arc-shaped projection 27 is used. However, similarly to the test conditions of the product of the present invention, the inner diameter of the valve seat was set to 36 mm, and the test was performed under the condition of water pressure of 1 Kgf / min. The result is shown by a solid line C. As is clear from FIG. 6, in the products A and B of the present invention, a small amount (15 to 20 l / min) was used.
The check valve body 10 suddenly and largely rotates due to the flowing water of 50 l / min at which is the minimum flowing water amount when the sprinkler is operated.
The opening angle of the check valve body 10 was large by running water of 1 kgf / cm 2 and was about 30 °. On the other hand, in the conventional product C, the increase in the opening angle of the check valve body is moderate due to a small amount of running water (15 to 20 l / min), and the minimum running water amount of 50 l / min at 1 kgf / cm 2 during sprinkler operation is The check valve opened only about 15 ° due to running water.
【００１４】従って、本発明品Ａ，Ｂにおいては、流量
感知角度は０〜３０°の間の広範囲内にとることがで
き、実用上では二次側配管内での漏水や点検中の少量の
流出により、また他の防火区域への送水のためのポンプ
起動に際した逆止弁体の僅かな開きにおいては感知せ
ず、スプリンクラー作動時の最低流水量である５０ｌ／
min at 1kgf ／cm2 の時には必ず作動する角度とし
て、例えば１５〜２０°の間の角度を感知角度に設定す
ればよい。これに対し、従来品Ｃにおいては、スプリン
クラー作動時の最低流水量（５０ｌ／min at 1kgf ／
cm2 ）の流水による逆止弁体の開き角は１５°しかない
ので、例えば作動角度を７．５〜１０°の間に設定した
とき、少量流水時の作動してはならない角度や、流水量
５０ｌ／min at 1kgf ／cm2 の必ず作動しなければな
らない角度からの角度巾の余裕が無い為、誤作動を起こ
し易い。Therefore, in the products A and B of the present invention, the flow rate sensing angle can be set within a wide range of 0 to 30 °, and in practical use, water leakage in the secondary side pipe or a small amount during inspection is required. The minimum flow rate of the sprinkler, which is the minimum flow rate of 50 l /, is not detected due to the outflow and the slight opening of the check valve body at the time of starting the pump for sending water to other fire protection areas.
When min at 1 kgf / cm 2, the sensing angle may be set to an angle that always operates, for example, an angle of 15 to 20 °. On the other hand, in the conventional product C, the minimum water flow rate (50 l / min at 1 kgf /
Since the opening angle of the check valve body due to running water of cm 2 ) is only 15 °, for example, when the operating angle is set between 7.5 and 10 °, the angle that should not be operated when running a small amount of water, Since there is no margin in the width of the amount of 50 l / min at 1 kgf / cm 2 that must be activated, malfunctions are likely to occur.
【００１５】（実施例２）図７および図８は本発明の第
２実施例を示す。この実施例では、上記円弧状突起体２
７に代えて、弁座５から円弧筒状壁３２を逆止弁体１０
の外周を所定のすきま部３３を介して囲むよう流出口３
側へ向けて突設する。その円弧筒状壁３２は逆止弁体１
０の回動中心を中心として描く円弧状に、かつ逆止弁体
１０の断面直径よりも僅かに大きい内径を持つ横断面Ｃ
形に形成することにより、逆止弁体１０の外周と円弧筒
状壁３２の内周とで形成される環状のすきま部３３の断
面を流路断面積とする。円弧筒状壁３２の横断面をＣ形
に形成するのは、円弧筒状壁３２の円周一部に切欠部３
２ａを設け、この切欠部３２ａにより逆止弁体１０とハ
ブ１３とをつなぐ細い首状の連接部１０ｃと干渉するの
を避けるためである。その他の構成は上記実施例１の場
合と同様である。これにおいても、上記実施例１の場合
と同様に、流水検知装置内の通水量が少ない時のスピン
ドル回動角度と、スプリンクラーヘツドが作動し放水し
た時のスピンドル回動角度との差を大きく採ることがで
きる。(Second Embodiment) FIGS. 7 and 8 show a second embodiment of the present invention. In this embodiment, the arc-shaped projection 2
7 instead of the valve seat 5, the circular arc cylindrical wall 32 is connected to the check valve body 10.
So that the outer circumference of the outlet is surrounded by a predetermined clearance 33.
Project toward the side. The arcuate tubular wall 32 is the check valve body 1
A cross section C in the shape of an arc drawn about the center of rotation of 0 and having an inner diameter slightly larger than the cross-sectional diameter of the check valve body 10.
By forming the check valve body 10 into a shape, the cross section of the annular clearance 33 formed by the outer circumference of the check valve body 10 and the inner circumference of the arcuate tubular wall 32 is the flow passage cross sectional area. The cross section of the arcuate tubular wall 32 is formed in a C shape because the notch 3 is formed in a part of the circumference of the arcuate tubular wall 32.
2a is provided to avoid interference with the thin neck-shaped connecting portion 10c that connects the check valve body 10 and the hub 13 with the cutout portion 32a. Other configurations are the same as those in the first embodiment. Also in this case, as in the case of the first embodiment, the difference between the spindle rotation angle when the water flow rate in the water flow detection device is small and the spindle rotation angle when the sprinkler head is actuated and discharges water is made large. be able to.
【００１６】[0016]
【発明の効果】本発明によれば、逆止弁体から円弧状突
起体を流入口側へ向けて突設し、この円弧状突起体は前
記逆止弁体の回動中心を中心として描く円弧状に、かつ
前記弁座の内径よりも僅かに小さい直径をもつ断面円形
状に形成して、弁座の内周と円弧状突起体とで形成され
る環状のすきま部の断面を流路断面積とした。したがっ
て、流水検知装置内の通水量が少ない時のスピンドルの
回動角度と、スプリンクラーヘッドが作動し放水した時
のスピンドルの回動角度との差を大きく採ることがで
き、流水感知角度をスプリンクラーヘッド１個が作動し
た時の流水時角度の近くに設定することで、非火災時の
少量通水時に誤報を発するおそれが無くなる。また弁座
の内周と円弧状突起体との間に形成される流路断面積の
小さいすきま部は環状であるため、スラッジやごみ等が
詰まるのを避けることができてそのすきま部での流水機
能が低下するおそれもなく、常に確実に作動できて有利
である。According to the present invention, an arcuate projection is provided so as to project from the check valve body toward the inlet side, and the arcuate projection is drawn around the center of rotation of the check valve body. It is formed in an arc shape and has a circular cross section having a diameter slightly smaller than the inner diameter of the valve seat, and the cross section of the annular clearance formed by the inner circumference of the valve seat and the arc-shaped projection is flowed. The cross-sectional area was used. Therefore, it is possible to make a large difference between the rotation angle of the spindle when the water flow rate in the water flow detection device is small and the rotation angle of the spindle when the sprinkler head operates and discharges water. By setting the angle close to the running water angle when one unit operates, there is no risk of giving a false alarm when passing a small amount of water when there is no fire. In addition, since the crevice with a small flow passage cross-sectional area, which is formed between the inner circumference of the valve seat and the arc-shaped projection, is annular, it is possible to avoid clogging of sludge, dust, etc. This is advantageous because it can always operate reliably without the risk of the running water function decreasing.
【００１７】弁座から円弧筒状壁を逆止弁体の外周をす
きま部をおいて囲むよう流出口側へ向けて突設すること
によっても、同様に流水感知角度をスプリンクラーヘッ
ド１個が作動した時の流水時角度の近くに設定すること
で非火災時の少量通水時の誤報を無くすることができ、
またスラッジやごみ等の詰まり問題を解消することもで
きる。Also, by projecting the arcuate cylindrical wall from the valve seat toward the outflow port side so as to surround the outer periphery of the check valve body with a clearance, a single sprinkler head operates in the same manner as the running water sensing angle. By setting it near the running water angle at the time of running, it is possible to eliminate false alarms when passing a small amount of water when there is no fire.
Also, the problem of clogging of sludge and dust can be eliminated.
【図１】実施例１の流水検知装置の縦断面図である。FIG. 1 is a vertical cross-sectional view of a flowing water detection device according to a first embodiment.
【図２】図１におけるＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA in FIG.
【図３】実施例１の流水検知装置の平面図である。FIG. 3 is a plan view of the running water detection device according to the first embodiment.
【図４】実施例１の流水検知装置の正面図である。FIG. 4 is a front view of the running water detection device according to the first embodiment.
【図５】実施例１の流水検知装置の側面図である。FIG. 5 is a side view of the running water detection device according to the first embodiment.
【図６】実施例１の流水検知装置の流水量と弁の開き角
との関係を示す説明図である。FIG. 6 is an explanatory diagram showing the relationship between the amount of flowing water and the opening angle of the valve of the flowing water detecting device according to the first embodiment.
【図７】実施例２の流水検知装置の縦断面図である。FIG. 7 is a vertical cross-sectional view of a flowing water detection device according to a second embodiment.
【図８】図７におけるＢ−Ｂ線断面図である。FIG. 8 is a sectional view taken along line BB in FIG. 7;
１ 流水制御弁 ２ 弁本体 ３ 流入口 ４ 流出口 ５ 弁座 ６ 弁室 １０ 逆止弁体 １１，１９ スピンドル ２４ センサ ２７ 円弧状突起体 ３２ 円弧筒状壁 1 Flow control valve 2 Valve body 3 Inlet 4 Outlet 5 Valve seat 6 Valve chamber 10 Check valve body 11, 19 Spindle 24 Sensor 27 Arc-shaped projection 32 Arc-shaped cylindrical wall
Claims (2)
前記流水制御弁は、一次側の流入口と二次側の流出口と
を有し、両者間に弁座を介して弁室を形成した弁本体
と、前記弁室に、前記流入口から流出口への流水圧によ
って開かれるよう回動可能にスピンドルまわりに軸支さ
れた逆止弁体とを有し、前記スピンドルは前記逆止弁体
と共に回動可能に装着され一端が前記弁本体の外部へ突
出しており、前記信号発生手段は前記逆止弁体の回動に
伴って回動する前記スピンドルの前記突出端の回動角を
検出して信号を発するセンサからなる作動弁型の流水検
知装置において、 前記逆止弁体から円弧状突起体を流入口側へ向けて突設
し、該円弧状突起体は前記逆止弁体の回動中心を中心と
して描く円弧状に、かつ前記弁座の内径よりも僅かに小
さい直径をもつ断面円形状に形成されていることを特徴
とする流水検知装置。1. A flow control valve and a signal generating means,
The water flow control valve has a primary-side inlet and a secondary-side outlet, and a valve main body having a valve chamber formed between them through a valve seat, and a flow from the inlet to the valve chamber. A check valve body rotatably supported around a spindle so as to be opened by flowing water pressure to the outlet, the spindle being rotatably mounted together with the check valve body, and one end of the valve body of the valve body. An operating valve type running water which is protruded to the outside and in which the signal generating means includes a sensor that detects a rotation angle of the protruding end of the spindle that rotates in accordance with the rotation of the check valve body and outputs a signal. In the detection device, an arcuate projection is provided so as to project from the check valve body toward the inlet side, and the arcuate projection has an arcuate shape centered on the rotation center of the check valve body, and It is characterized by being formed in a circular cross section with a diameter slightly smaller than the inner diameter of the valve seat. A flowing water detector.
前記流水制御弁は、一次側の流入口と二次側の流出口と
を有し、両者間に弁座を介して弁室を形成した弁本体
と、前記弁室に、前記流入口から流出口への流水圧によ
って開かれるよう回動可能にスピンドルまわりに軸支さ
れた逆止弁体とを有し、前記スピンドルは前記逆止弁体
と共に回動可能に装着され一端が前記弁本体の外部へ突
出しており、前記信号発生手段は前記逆止弁体の回動に
伴って回動する前記スピンドルの前記突出端の回動角を
検出して信号を発するセンサからなる作動弁型の流水検
知装置において、 前記弁座から円弧筒状壁を前記逆止弁体の外周を囲むよ
う流出口側へ向けて突設し、該円弧筒状壁は前記逆止弁
体の回動中心を中心として描く円弧状に、かつ前記逆止
弁体の断面直径よりも僅かに大きい内径を持つ横断面Ｃ
形に形成されていることを特徴とする流水検知装置。2. A flow control valve and a signal generating means,
The water flow control valve has a primary-side inlet and a secondary-side outlet, and a valve main body having a valve chamber formed between them through a valve seat, and a flow from the inlet to the valve chamber. A check valve body rotatably supported around a spindle so as to be opened by flowing water pressure to the outlet, the spindle being rotatably mounted together with the check valve body, and one end of the valve body of the valve body. An operating valve type running water which is protruded to the outside and in which the signal generating means includes a sensor that detects a rotation angle of the protruding end of the spindle that rotates in accordance with the rotation of the check valve body and outputs a signal. In the detection device, an arcuate tubular wall is projectingly provided from the valve seat toward the outlet side so as to surround the outer circumference of the check valve body, and the arcuate tubular wall is centered on the rotation center of the check valve body. And a cross section C having an inner diameter slightly larger than the cross-sectional diameter of the check valve body.
A flowing water detection device characterized by being formed in a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12337896A JP3631843B2 (en) | 1996-05-17 | 1996-05-17 | Flowing water detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12337896A JP3631843B2 (en) | 1996-05-17 | 1996-05-17 | Flowing water detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09299501A true JPH09299501A (en) | 1997-11-25 |
| JP3631843B2 JP3631843B2 (en) | 2005-03-23 |
Family
ID=14859105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12337896A Expired - Fee Related JP3631843B2 (en) | 1996-05-17 | 1996-05-17 | Flowing water detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3631843B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010151524A (en) * | 2008-12-24 | 2010-07-08 | Taiyo Valve Seisakusho:Kk | Flow detector |
| KR20180082782A (en) * | 2017-01-11 | 2018-07-19 | 엘지전자 주식회사 | a Check valve for a laundry processing device and a Laundry processing device including the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4837831U (en) * | 1971-09-09 | 1973-05-09 | ||
| JPS4840391Y1 (en) * | 1970-01-26 | 1973-11-27 | ||
| JPH01148179U (en) * | 1988-03-31 | 1989-10-13 | ||
| JPH07265454A (en) * | 1994-03-30 | 1995-10-17 | Nohmi Bosai Ltd | Flowing water detector for fire extinguishing facility |
-
1996
- 1996-05-17 JP JP12337896A patent/JP3631843B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840391Y1 (en) * | 1970-01-26 | 1973-11-27 | ||
| JPS4837831U (en) * | 1971-09-09 | 1973-05-09 | ||
| JPH01148179U (en) * | 1988-03-31 | 1989-10-13 | ||
| JPH07265454A (en) * | 1994-03-30 | 1995-10-17 | Nohmi Bosai Ltd | Flowing water detector for fire extinguishing facility |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010151524A (en) * | 2008-12-24 | 2010-07-08 | Taiyo Valve Seisakusho:Kk | Flow detector |
| KR20180082782A (en) * | 2017-01-11 | 2018-07-19 | 엘지전자 주식회사 | a Check valve for a laundry processing device and a Laundry processing device including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3631843B2 (en) | 2005-03-23 |
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